Kirkman triple systems of order 21 with nontrivial automorphism group

There are 50,024 Kirkman triple systems of order 21 admitting an automorphism of order 2. There are 13,280 Kirkman triple systems of order 21 admitting an automorphism of order 3. Together with the 192 known systems and some simple exchange operations, this leads to a collection of

• Type: Journal
• Year: 2002
• Where: MOC
• Authors: Myra B. Cohen, Charles J. Colbourn, Lee A. Ives, Alan C. H. Ling
• Keywords: Automorphism, Kirkman Triple Systems, MOC 2002